package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishItemVO;
import com.sky.vo.DishOverViewVO;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Override
    public void saveDish(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //为菜品表增加
        dishMapper.insert(dish);

        Long dishId = dish.getId();

        //为菜品口味表增加
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors == null || flavors.size() > 0) {
            flavors.forEach(df -> {
                df.setDishId(dishId);
            });
            dishFlavorMapper.insert(flavors);
        }
    }

    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dishPageQueryDTO, dishVO);

        Page<DishVO> page = dishMapper.page(dishVO);

        long total = page.getTotal();
        List<DishVO> result = page.getResult();

        return new PageResult(total, result);

    }

    @Transactional
    public void delete(List<Long> ids) {
        //是否存在起售
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //是否存在被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds == null || setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品数据
        dishMapper.deleteByIds(ids);
        //删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getById(id);

        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    @Transactional
    public void update(DishDTO dishDTO) {
        //更新菜品表
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);


        //更新口味表

        //删除原来的口味数据
        List<Long> dishId = new ArrayList<>();
        dishId.add(dishDTO.getId());
        dishFlavorMapper.deleteByDishIds(dishId);

        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishDTO.getId()));
            dishFlavorMapper.insert(flavors);
        }
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }

    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE) //确保能够上架到套餐中的都是起售中的套餐
                .build();
        return dishMapper.list(dish);
    }

    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        //查询菜品
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        //查询菜品对应口味
        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


}
